/// <summary>
/// form file dialog filter string
/// </summary>
/// <returns>filter string</returns>
private string GetFileDialogFilter()
{
StringBuilder filter = new StringBuilder();
foreach (KeyValuePair <string, string> fType in _tManager.GetSupportedFileTypes())
{
filter.Append(fType.Value);
filter.Append("|");
filter.Append(fType.Key);
filter.Append("|");
}
return(filter.Remove(filter.Length - 1, 1).ToString());
}